Mohs surgery histopathology concordance in Australia

Background: Mohs micrographic surgery is an important technique for dealing with difficult non‐melanoma skin cancers. The ability of the Mohs surgeon to correctly interpret the histopathology is crucial to the practice of this surgery. This study sought to assess the concordance between a Mohs surgeon and a dermatopathologist in the reading of Mohs section histopathology slides. Methods: This study was a retrospective study of Mohs frozen section histopathology slides of patients from a private Mohs practice. The slides were provided for assessment by a dermatopathologist who had to interpret the histopathology and mark on a Mohs map the location of the tumour. Results: We demonstrate a 95% agreement between the Mohs surgeon and the dermatopathologist in the interpretation of Mohs frozen section histopathology slides. Conclusion: An Australian Mohs surgeon is capable of correctly identifying and interpreting histopathology in non‐melanoma skin cancers, and this compares favourably to an overseas study.